Describes background colors and images and the style of borders. New functionality includes the ability to stretch the background image, to use images for the borders, to round the corners of the box and to add a box shadow outside the border.

Multiple Backgrounds Explains how to add multiple backgrounds to an element using “background-image” property.

Background Size Illustrates how to specify the size of the background images using “background-size” property (Opera & WebKit based browsers).